Ferrous fumarate and Red cell distribution width increased - a phase IV clinical study of FDA data

Summary:

Red cell distribution width increased is reported as a side effect among people who take Ferrous fumarate (ferrous fumarate), especially for people who are female, 60+ old, also take Metformin, and have Depression.

The phase IV clinical study analyzes which people have Red cell distribution width increased when taking Ferrous fumarate. It is created by eHealthMe based on reports of 9,374 people who have side effects when taking Ferrous fumarate from the FDA, and is updated regularly.

What is Ferrous fumarate?

Ferrous fumarate has active ingredients of ferrous fumarate. It is often used in anemia. eHealthMe is studying from 9,840 Ferrous fumarate users. Check the latest studies of Ferrous fumarate.

What is Red cell distribution width increased?

Red cell distribution width increased is found to be associated with 607 drugs and 653 conditions by eHealthMe. Check the latest studies of Red cell distribution width increased.

On Jul, 12, 2026

9,374 people reported to have side effects when taking Ferrous fumarate.
Among them, 23 people (0.25%) have Red cell distribution width increased.

Could Ferrous fumarate cause Red cell distribution width increased?

Among these 23 people:

What is the gender of people who have Red cell distribution width increased when taking Ferrous fumarate? *

female: 86.67 %
male: 13.33 %

What is the age of people who have Red cell distribution width increased when taking Ferrous fumarate? *

What are other drugs people take besides Ferrous fumarate? *

What are other side effects people have besides Red cell distribution width increased? *

Fatigue (feeling of tiredness): 12 people, 52.17%
Haemoglobin Decreased: 12 people, 52.17%
High Blood Pressure: 11 people, 47.83%
Blood Creatinine Increased: 10 people, 43.48%
Heart Rate Increased: 10 people, 43.48%
Blood Glucose Increased: 9 people, 39.13%
Glomerular Filtration Rate Decreased: 9 people, 39.13%
White Blood Cell Count Increased: 8 people, 34.78%
Dyspnea (difficult or laboured breathing): 7 people, 30.43%
Glycosylated Haemoglobin Increased: 7 people, 30.43%

What are the existing conditions these people have? *

Depression: 9 people, 39.13%
Rheumatoid Arthritis (a chronic progressive disease causing inflammation in the joints): 6 people, 26.09%
Colitis (inflammation of colon): 5 people, 21.74%
Type 2 Diabetes: 5 people, 21.74%
Crohn's Disease (a condition that causes inflammation of the gastrointestinal tract): 5 people, 21.74%
Dementia Alzheimer's Type (loss of mental ability with alzheimer's symptom): 4 people, 17.39%
Schizophrenia (a mental disorder characterized by a breakdown of thought processes): 4 people, 17.39%
Psychotic Disorder: 4 people, 17.39%
Pain: 4 people, 17.39%
Hereditary Neuropathic Amyloidosis (hereditary- diseases resulting from abnormal deposition of certain proteins (amyloid) in various bodily areas by problems with signals from the nerves): 3 people, 13.04%

* Approximation only. Some reports may have incomplete information.

Do you take Ferrous fumarate and have Red cell distribution width increased?

- Check whether Red cell distribution width increased is associated with a drug or a condition
- Predict drug outcomes for up to one year with AI
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Related studies:

Effectiveness of, long term effects of, and alternative drugs to Ferrous fumarate:

Ferrous fumarate (9,840 reports)

Browse all side effects of Ferrous fumarate:

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Browse all the drugs that are associated with Red cell distribution width increased:

Red cell distribution width increased (607 drugs)

Browse all the conditions that are associated with Red cell distribution width increased:

Red cell distribution width increased (653 conditions)

How the study uses the data?

The study uses data from the FDA. It is based on ferrous fumarate (the active ingredients of Ferrous fumarate) and Ferrous fumarate (the brand name). Other drugs that have the same active ingredients (e.g. generic drugs) are not considered. Dosage of drugs is not considered in the study.

How to use the study?

DO NOT STOP MEDICATIONS without first consulting your doctor. If there are any serious or long term adverse effects discovered in the study, discuss the study with your doctor to ensure that proper medication management will be in place if applicable.

Who is eHealthMe?

With medical big data and proven AI/ML algorithms, eHealthMe provides a platform for everyone to run phase IV clinical trials. We study millions of patients and 5,000 more each day. Results of our real-world drug study have been referenced on 800+ peer-reviewed medical publications, including The Lancet, Mayo Clinic Proceedings, and Nature. Our analysis results are available to researchers, health care professionals, patients (testimonials), and software developers (open API).

WARNING, DISCLAIMER, USE FOR PUBLICATION

WARNING: Please DO NOT STOP MEDICATIONS without first consulting a physician since doing so could be hazardous to your health.

DISCLAIMER: All material available on eHealthMe.com is for informational purposes only, and is not a substitute for medical advice, diagnosis, or treatment provided by a qualified healthcare provider. All information is observation-only. Our phase IV clinical studies alone cannot establish cause-effect relationship. Different individuals may respond to medication in different ways. Every effort has been made to ensure that all information is accurate, up-to-date, and complete, but no guarantee is made to that effect. The use of the eHealthMe site and its content is at your own risk.

If you use this eHealthMe study on publication, please acknowledge it with a citation: study title, URL, accessed date.